REACTIONS INDUCED BY PHYTOPARASITIC NEMAT ODES IN THE BANANA PLANT MUSA-ACUMINATA (GROUP AAA) - HIERARCHIZATION OF PARAMETERS ADJUSTED FOR VARIETAL SELECTION
T. Mateille et al., REACTIONS INDUCED BY PHYTOPARASITIC NEMAT ODES IN THE BANANA PLANT MUSA-ACUMINATA (GROUP AAA) - HIERARCHIZATION OF PARAMETERS ADJUSTED FOR VARIETAL SELECTION, Canadian journal of botany, 73(12), 1995, pp. 2006-2018
The susceptibility of bananas to phytoparasitic nematodes, the damages
caused by nematodes, and the plant defense reactions can be evaluated
respectively by the multiplication rate of parasites, the plant growt
h and metabolism, and the modifications of the secondary metabolism. T
he comparison, through multivariate analyses, of these four groups of
parameters between two banana cultivars (Poyo and Gros Michel), differ
ently susceptible to nematodes, helps to hierarchize the importance of
these groups. So, the variables associated with shoot and root growth
and the variables associated with plant physiology (photosynthesis, c
arbon metabolism, nitrogen and mineral absorption) are quite bad param
eters because they evolve anarchically with the initial nematode popul
ation pressure. On the opposite, the final nematode population pressur
e and the variables associated with host defense reactions (secondary
metabolism) are more reliable because they give more homogeneous resul
ts. It is then possible to assess the usefulness of the parameters des
cribing banana susceptibility to nematodes and to give reliable criter
ia to geneticians for nematode resistance breeding programs.